CN114112256B - Exciting device and exciting method for rotor dynamics test - Google Patents
Exciting device and exciting method for rotor dynamics test Download PDFInfo
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- CN114112256B CN114112256B CN202111222225.8A CN202111222225A CN114112256B CN 114112256 B CN114112256 B CN 114112256B CN 202111222225 A CN202111222225 A CN 202111222225A CN 114112256 B CN114112256 B CN 114112256B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides a rotor dynamics test excitation device and an excitation method, wherein the rotor dynamics test excitation device comprises a front-end rotor, a first bearing, a second bearing and a support, the rotor dynamics test excitation device further comprises an excitation switching section, and the excitation switching section comprises: the cylindrical body is coaxially sleeved outside the front-end rotor and is arranged at intervals with the front-end rotor, and one end of the cylindrical body is connected with the inner ring of the second bearing; and the connecting part is fixedly arranged on the outer side of the cylindrical body and is detachably connected with the support. The vibration exciter has the beneficial effects that the vibration exciter can be connected to the vibration excitation switching section, and vibration excitation operation on the second bearing position is realized through the vibration excitation switching section so as to simulate excitation of the high-voltage rotor to the low-voltage rotor.
Description
Technical Field
The invention relates to the field of aeroengines, in particular to a rotor dynamics test excitation device and an excitation method.
Background
The high-performance high thrust-weight ratio aviation turbofan double-rotor engine is in dynamic design. There may be a critical speed of cross excitation dangerous bending, and because of the limitations of various structural design conditions, the critical speed of the step may not be able to be brought out of the working speed range, so that an effective vibration control method must be adopted to reduce the influence of the critical speed of cross excitation on the engine.
Because the second bearing is arranged inside the rotor, the second bearing cannot be excited directly by the exciter due to structural limitation so as to simulate excitation of the high-pressure rotor to the low-pressure rotor.
Disclosure of Invention
The invention provides a rotor dynamics test excitation device and an excitation method, which aim to excite a second bearing.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a experimental vibration excitation device of rotor dynamics, includes front end rotor, first bearing, second bearing and support, and experimental vibration excitation device of rotor dynamics still includes the excitation changeover portion, and the excitation changeover portion includes: the cylindrical body is coaxially sleeved outside the front-end rotor and is arranged at intervals with the front-end rotor, and one end of the cylindrical body is connected with the inner ring of the second bearing; and the connecting part is fixedly arranged on the outer side of the cylindrical body and is detachably connected with the support.
Further, a distance between the connecting portion and one end of the cylindrical body is a, and a distance between the connecting portion and the other end of the cylindrical body is b, wherein a < b.
Further, the distance between the connecting portion and one end of the cylindrical body is a, and the distance between the connecting portion and the other end of the cylindrical body is b, wherein a > b.
Further, the distance between the connecting portion and one end of the cylindrical body is a, and the distance between the connecting portion and the other end of the cylindrical body is b, where a=b.
Further, the connecting portion includes: the annular outer ring is connected with the support by a bolt connection mode; the radial setting of annular outer lane is all followed to a plurality of web spokes, and a plurality of web spokes are along the circumference interval equipartition of annular outer lane, and the inner of every web spoke all is connected with the cylindric body, and the outer end of every web spoke all is connected with annular outer lane.
Further, the other end of the cylindrical body is provided with a radial outer flange, and the radial outer flange is provided with a threaded hole connected with an excitation rod of the vibration exciter.
Further, a through hole is formed in the support, and the excitation rod can penetrate through the through hole and is connected with the threaded hole.
The invention also provides an excitation method, which is carried out by adopting the rotor dynamics test excitation device, and comprises the following steps: step one, connecting an excitation switching section of a rotor dynamic test excitation device with a support, and connecting one end of a cylindrical body with an inner ring of a second bearing; step two, connecting an excitation rod of the vibration exciter with the other end of the cylindrical body; and step three, starting the vibration exciter to finish the vibration excitation operation of the second bearing and detect the required experimental data.
The vibration exciter has the beneficial effects that the vibration exciter can be connected to the vibration excitation switching section, and vibration excitation operation on the second bearing position is realized through the vibration excitation switching section so as to simulate excitation of the high-voltage rotor to the low-voltage rotor.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an excitation switching section according to an embodiment of the present invention.
Reference numerals in the drawings: 1. a first bearing; 2. a second bearing; 3. a front end rotor; 4. excitation switching section; 41. a cylindrical body; 5. a support; 42. an annular outer ring; 43. and connecting spokes.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 and 2, the embodiment of the invention provides a rotor dynamics test excitation device, which comprises a front-end rotor 3, a first bearing 1, a second bearing 2 and a support 5, wherein the rotor dynamics test excitation device further comprises an excitation switching section 4, and the excitation switching section 4 comprises a cylindrical body 41 and a connecting part. The cylindrical body 41 is coaxially sleeved outside the front-end rotor 3 and is arranged at intervals with the front-end rotor 3, and one end of the cylindrical body 41 is connected with the inner ring of the second bearing 2; the connection portion is fixedly provided on the outer side of the cylindrical body 41, and the connection portion is detachably connected with the holder 5.
According to the embodiment of the invention, the vibration exciter can be connected to the vibration excitation switching section 4, and vibration excitation operation on the second bearing 2 is realized through the vibration excitation switching section 4, so that excitation of the high-voltage rotor to the low-voltage rotor is simulated.
In the embodiment of the present invention, the distance between the connecting portion and one end of the cylindrical body 41 is a, and the distance between the connecting portion and the other end of the cylindrical body 41 is b, where a < b.
During operation, the vibration exciter is abutted against the other end of the cylindrical body 41, one end of the cylindrical body 41 is abutted against the inner ring of the second bearing 2, and due to the lever principle, the excitation value of the second bearing 2 is smaller than the excitation value actually output by the vibration exciter, so that the working condition of the high-pressure rotor to the low-pressure rotor at the smaller excitation value can be simulated.
In another embodiment of the present invention, the distance between the connecting portion and one end of the cylindrical body 41 is a, and the distance between the connecting portion and the other end of the cylindrical body 41 is b, where a > b.
During operation, the vibration exciter is abutted with the other end of the cylindrical body 41, one end of the cylindrical body 41 is abutted with the inner ring of the second bearing 2, and the excitation value of the second bearing 2 is larger than the excitation value actually output by the vibration exciter due to the lever principle, so that the working condition of the high-pressure rotor to the low-pressure rotor at a larger excitation value can be simulated.
In the third embodiment of the present invention, the distance between the connecting portion and one end of the cylindrical body 41 is a, and the distance between the connecting portion and the other end of the cylindrical body 41 is b, where a=b.
In operation, the vibration exciter is abutted against the other end of the cylindrical body 41, one end of the cylindrical body 41 is abutted against the inner ring of the second bearing 2, and the excitation value of the second bearing 2 is equal to the excitation value actually output by the vibration exciter due to the lever principle, so that the working condition of the second bearing 2 in a set excitation value can be simulated.
As shown in fig. 2, the connection portion includes an annular outer race 42 and a plurality of connection spokes 43. The annular outer ring 42, the annular outer ring 42 is connected with the support 5 through a bolt connection mode. Each spoke 43 of the plurality of spokes 43 is disposed along the radial direction of the annular outer ring 42, and the plurality of spokes 43 are uniformly distributed along the circumferential direction of the annular outer ring 42 at intervals, the inner end of each spoke 43 is connected with the cylindrical body 41, and the outer end of each spoke 43 is connected with the annular outer ring 42.
The annular outer ring 42 in the embodiment of the present invention serves as the connection support 5, and the plurality of connection spokes 43 are used to connect the annular outer ring 42 and the cylindrical body 41, and serve as a support for the annular outer ring 42.
In this embodiment, the connecting spokes 43 may be in other hollow forms, and are not limited to those shown in fig. 2, and any structure capable of serving as a connecting and fixing support should be within the scope of protection of the present application.
As shown in fig. 2, the other end of the cylindrical body 41 is provided with a radially outer flange provided with a screw hole connected to the excitation rod of the exciter.
In the embodiment, the vibration excitation rod of the vibration exciter can be directly and fixedly installed by arranging the threaded holes on the radial outer flange in the installation process, so that safety accidents caused by separation of the vibration excitation rod and the radial outer flange in the vibration excitation operation process can be avoided.
Of course, other structures, such as a clamping groove, may be adopted for the screw hole. When the vibration exciter needs to be installed, the end part of the vibration excitation rod of the vibration exciter is clamped in the clamping groove, so that the purpose of clamping and fixing is realized.
Preferably, the support 5 is provided with a through hole, and the excitation rod can pass through the through hole and be connected with the threaded hole. In this embodiment, the through hole should satisfy that the excitation rod can pass smoothly and take out, and be convenient for excitation rod and radial outer flange on set for the position butt, make it can easy dismouting.
In this embodiment, a sealing component such as a cover may be further disposed in addition to the through hole, so as to seal the through hole in a non-working state.
The invention also provides an excitation method, which is carried out by adopting the rotor dynamics test excitation device, and comprises the following steps:
step one, connecting an excitation switching section 4 of a rotor dynamic test excitation device with a support 5, and connecting one end of a cylindrical body 41 with an inner ring of a second bearing 2;
step two, connecting an excitation rod of the vibration exciter with the other end of the cylindrical body 41;
and step three, starting the vibration exciter to finish the vibration excitation operation of the second bearing 2 and detect the required experimental data.
According to the embodiment of the invention, the excitation operation of the second bearing 2 can be realized so as to simulate the excitation of the high-pressure rotor to the low-pressure rotor.
The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical characteristics and technical scheme, technical characteristics and technical scheme can be freely combined for use.
Claims (6)
1. The utility model provides a experimental vibration excitation device of rotor dynamics, includes front end rotor, first bearing, second bearing and support, its characterized in that, experimental vibration excitation device of rotor dynamics still includes excitation changeover portion, the excitation changeover portion includes:
the cylindrical body is coaxially sleeved outside the front-end rotor and is arranged at intervals with the front-end rotor, and one end of the cylindrical body is connected with the inner ring of the second bearing;
the connecting part is fixedly arranged on the outer side of the cylindrical body and is detachably connected with the support;
the connection part includes:
the annular outer ring is connected with the support in a bolt connection mode;
the connecting spokes are arranged along the radial direction of the annular outer ring, the connecting spokes are uniformly distributed along the circumferential direction of the annular outer ring at intervals, the inner end of each connecting spoke is connected with the cylindrical body, and the outer end of each connecting spoke is connected with the annular outer ring;
the other end of the cylindrical body is provided with a radial outer flange, and the radial outer flange is provided with a threaded hole connected with an excitation rod of the vibration exciter.
2. The excitation device according to claim 1, wherein a distance between the connecting portion and an end of the cylindrical body connected to the excitation rod is a, and a distance between the connecting portion and an end of the cylindrical body connected to the bearing inner ring is b, wherein a < b.
3. The excitation device according to claim 1, wherein a distance between the connecting portion and one end of the cylindrical body connected to the excitation rod is a, and a distance between the connecting portion and one end of the cylindrical body connected to the bearing inner ring is b, wherein a > b.
4. The excitation device according to claim 1, wherein a distance between the connecting portion and an end of the cylindrical body connected excitation rod is a, and a distance between the connecting portion and an end of the cylindrical body connected bearing inner ring is b, wherein a=b.
5. The excitation device for the rotordynamic test as recited in claim 1, wherein said support is provided with a through hole, and said excitation rod is capable of passing through said through hole and being connected to said threaded hole.
6. A method of excitation using the rotor dynamics test excitation device according to any one of claims 1 to 5, characterized in that the excitation method comprises:
step one, connecting an excitation switching section of the rotor dynamic test excitation device with the support, and connecting one end of the cylindrical body with an inner ring of the second bearing;
step two, connecting an excitation rod of the vibration exciter with the other end of the cylindrical body;
and step three, starting the vibration exciter to finish the vibration excitation operation of the second bearing and detect the required experimental data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111222225.8A CN114112256B (en) | 2021-10-20 | 2021-10-20 | Exciting device and exciting method for rotor dynamics test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111222225.8A CN114112256B (en) | 2021-10-20 | 2021-10-20 | Exciting device and exciting method for rotor dynamics test |
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| CN114112256A CN114112256A (en) | 2022-03-01 |
| CN114112256B true CN114112256B (en) | 2023-06-13 |
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